From: Nathan Chancellor <nathan@kernel.org>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org
Cc: linux-kernel@vger.kernel.org, llvm@lists.linux.dev,
patches@lists.linux.dev, Nathan Chancellor <nathan@kernel.org>
Subject: [PATCH 5/6] x86/build: Remove cc-option from -mskip-rax-setup
Date: Thu, 14 Aug 2025 18:31:41 -0700 [thread overview]
Message-ID: <20250814-x86-min-ver-cleanups-v1-5-ff7f19457523@kernel.org> (raw)
In-Reply-To: <20250814-x86-min-ver-cleanups-v1-0-ff7f19457523@kernel.org>
This has been supported in GCC since 5.1 and clang since 14.0. Now that
x86 requires LLVM 15 or newer since commit 7861640aac52 ("x86/build:
Raise the minimum LLVM version to 15.0.0"), this flag can be
unconditionally added, saving a compiler invocation.
Link: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=fbe575b652f5bdcc459f447a0e6f0e059996d4ef
Link: https://github.com/llvm/llvm-project/commit/a9fba2be35db674971382e38b99a31403444d9bf
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
---
arch/x86/Makefile | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 1bbf943fe9e1..4b4e2a3ac6df 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -160,7 +160,7 @@ else
KBUILD_CFLAGS += $(cc_stack_align8)
# Use -mskip-rax-setup if supported.
- KBUILD_CFLAGS += $(call cc-option,-mskip-rax-setup)
+ KBUILD_CFLAGS += -mskip-rax-setup
ifdef CONFIG_X86_NATIVE_CPU
KBUILD_CFLAGS += -march=native
--
2.50.1
next prev parent reply other threads:[~2025-08-15 1:32 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-15 1:31 [PATCH 0/6] x86: Clean ups after minimum support compiler version bump Nathan Chancellor
2025-08-15 1:31 ` [PATCH 1/6] x86/build: Remove cc-option for GCC retpoline flags Nathan Chancellor
2025-08-15 1:31 ` [PATCH 2/6] x86/build: Remove cc-option from stack alignment flags Nathan Chancellor
2025-08-15 1:31 ` [PATCH 3/6] x86/build: Clean up stack alignment flags in CC_FLAGS_FPU Nathan Chancellor
2025-08-15 1:31 ` [PATCH 4/6] x86/build: Remove cc-option from -mno-fp-ret-in-387 Nathan Chancellor
2025-08-15 1:31 ` Nathan Chancellor [this message]
2025-08-15 1:31 ` [PATCH 6/6] x86/Kconfig: Clean up LLVM version checks in IBT configurations Nathan Chancellor
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